Ais a group of letters that have a particular meaning which appears at the beginning of a word.

root word
suffix
prefix
base word

The correct answer is "prefix."

Thus, the complete sentence is:

A prefix is a group of letters that have a particular meaning which appears at the beginning of a word.

The prefixes are affixes that form words from a morpheme that precedes the radical. Thus, they modify their meaning but, generally, maintain the grammatical class to which they belong.

the cost of attendance or coa is an approximate budget for the cost of attendance of the whole academic year. in order to calculate this, universities take into consideration many factors like room and board, tuitions and fees, books, transportation and personal expenses such as medicine, laundry, clothing. all these factors combined make up the final sum to the cost of attendance in each university.

i dont kmow it? !